The editors of the Daily Mirror and Sunday Mirror have left "with immediate effect" and the papers are moving to a seven-day publishing model, the company announced.
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The Facebook founder revealed the plan as he and wife Priscilla Chan announced the birth of their baby daughter, Max.
At least 300 people are actively promoting and recruiting for the terror group from within the United States, academics have found.
Hollywood film director and actor Steven Seagal has been asked to train Serbian special forces in martial arts.